Do autographs need a COA to be real?

No. A signature is either genuine or it is not, and a document written years afterwards has no effect on what happened when the pen touched the item. A great many unquestionably real autographs have no certificate at all — signed in person, kept in a family, never sold to anyone. What a certificate changes is not authenticity but liquidity: whether a stranger can confirm the piece without having to trust you.

Two separate questions, routinely confused

“Is this real?” is a question about an event in the past. “Can I prove it?” is a question about evidence in the present. A certificate of authenticity only ever answers the second one, and it answers it as an opinion — a named examiner’s written judgement about one specific item — rather than as proof.

Which is why the logic runs badly in both directions. No certificate does not mean fake. A certificate does not mean real. The paperwork is one piece of evidence among several, and it happens to be the piece that is easiest to manufacture.

What makes a certificate of authenticity legitimate? →

What does the same job as a certificate

Provenance is the stronger form of evidence and always has been, because it describes the signing rather than opining on it afterwards. If you have any of the following, you have something a forger cannot produce on a printer:

• Photographs of the signing, ideally showing the item, the signer and the person who obtained it
• A dated ticket, wristband or event programme tying the piece to a place and a day
• The original receipt or invoice, or correspondence with the dealer or auction house that sold it
• A written account from whoever obtained it — a note in a relative’s hand recording where and when is worth keeping, not throwing away
• An unbroken chain of ownership, even an informal one, from the signing to you

Keep all of it physically with the item. Provenance separated from the piece it belongs to stops being provenance and becomes a box of loose paper.

What you give up by having no paperwork

A buyer who cannot verify a piece prices in the risk that it is fake, and that discount is usually far larger than the cost of authentication would have been. Auction houses and consignment platforms are cautious about uncertified material or decline it outright. Insurers and estate appraisers want documentation before they will attach a figure to anything.

The effect compounds over time. An undocumented piece that passes through two or three owners loses the story that made it credible, and each owner has less to pass on than the last. Documentation is how a signature keeps its history attached to it.

When a certificate is genuinely worth getting

When the piece is valuable enough that the fee is small against the price. When the signer has died, so the signature can never be repeated in front of a witness. When the signer is heavily forged, or heavily autopenned, which describes most of the well-known names. When you intend to sell or consign, now or eventually. And when the material is going into an estate, where somebody who never met you will have to work out what it is.

For anything you are keeping, that you obtained yourself, and that you can account for in a sentence, a certificate is optional. The photograph you took at the signing does more.

Where can I get an autograph authenticated? →

If you do get one, make it a checkable one

A certificate is only useful to the extent that a stranger can verify it independently. That means a named issuer with a traceable business, a description tied to that specific item, a serial number that resolves in the issuer’s own live registry, and a guarantee with its terms written down. Piece of the Past’s full letters of authenticity illustrate the individual piece, carry a serial number, and include a scannable QR code that opens the registry entry — and they are full-force transferable, so the documentation keeps its weight when the item is sold on or inherited.

The alternative is a certificate that exists only as decoration, which is worse than none at all: it invites a buyer to stop checking at the exact moment they should be looking harder.